/Engine/Source/Runtime/Foliage/Public/InstancedFoliageActor.h
Finds all instances in the provided box and get their transforms.
void GetOverlappingBoxTransforms ( const [UFoliageType](API\Runtime\Foliage\UFoliageType) * FoliageType, const FBox & Box, [TArray](API\Runtime\Core\Containers\TArray)< FTransform > & OutTransforms ) const